Is It Safe to Run a Generator in the Garage with the Door Open?

Running a generator in the garage with the door open is one of the most persistent myths in emergency preparedness — and one of the most deadly. Carbon monoxide (CO) from a running generator does not dissipate safely with an open garage door. The Electrical Safety Authority (ESA) and Health Canada both identify improper generator use as a leading cause of CO poisoning fatalities in Ontario.

Is It Safe to Run a Generator in the Garage with the Door Open?

No. Running a generator in a garage — even with the door open — is not safe. The only safe location for a generator is outdoors, at least 6 metres from any door, window, or vent of an occupied building.

Safe Generator Operation Checklist

• At least 6 metres from any door, window, or vent
• On open ground, not under any covering
• Exhaust directed away from the building
• Never connect to panel without a transfer switch
• CO detectors verified functional on all levels

Contact Us

Need a transfer switch or standby generator installation? Our ESA-licensed electricians serve the GTA. Call us at 416-838-9006 or visit our contact page.

Amir Azimipour

Electrician Since 2008 Journeyman Electrician Designated Master Electrician at EZSMART Corp